com.learnNcode.mediachooser.fragment.ImageFragment.java Source code

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Here is the source code for com.learnNcode.mediachooser.fragment.ImageFragment.java

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/*
 * Copyright 2013 - learnNcode (learnncode@gmail.com)
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.learnNcode.mediachooser.fragment;

import java.util.ArrayList;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.widget.Toast;

import com.learnNcode.mediachooser.MediaChooserConstants;
import com.learnNcode.mediachooser.MediaModel;
import com.learnNcode.mediachooser.R;
import com.learnNcode.mediachooser.adapter.GridViewAdapter;

public class ImageFragment extends Fragment {

    private ArrayList<String> mSelectedItems = new ArrayList<String>();
    private ArrayList<MediaModel> mGalleryModelList;
    private GridView mImageGridView;
    private View mView;
    private OnImageSelectedListener mCallback;
    private GridViewAdapter mImageAdapter;

    // Container Activity must implement this interface
    public interface OnImageSelectedListener {
        public void onImageSelected(int count);
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);

        // This makes sure that the container activity has implemented
        // the callback interface. If not, it throws an exception
        try {
            mCallback = (OnImageSelectedListener) activity;
        } catch (ClassCastException e) {
            throw new ClassCastException(activity.toString() + " must implement OnHeadlineSelectedListener");
        }

    }

    public ImageFragment() {
        setRetainInstance(true);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        if (mView == null) {
            mView = inflater.inflate(R.layout.view_grid_layout_media_chooser, container, false);

            mImageGridView = (GridView) mView.findViewById(R.id.gridViewFromMediaChooser);

            if (getArguments() != null) {
                initPhoneImages(getArguments().getString("name"));
            } else {
                initPhoneImages();
            }

        } else {
            ((ViewGroup) mView.getParent()).removeView(mView);
        }

        return mView;
    }

    private void initPhoneImages(String bucketName) {
        try {
            final String orderBy = MediaStore.Images.Media.DATE_TAKEN;
            String searchParams = null;
            String bucket = bucketName;
            searchParams = "bucket_display_name = \"" + bucket + "\"";

            final String[] columns = { MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID };
            Cursor imagecursor = getActivity().getContentResolver().query(
                    MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns, searchParams, null, orderBy + " DESC");
            setAdapter(imagecursor);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private void initPhoneImages() {
        try {
            final String orderBy = MediaStore.Images.Media.DATE_TAKEN;
            final String[] columns = { MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID };
            Cursor imagecursor = getActivity().getContentResolver()
                    .query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns, null, null, orderBy + " DESC");

            setAdapter(imagecursor);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private void setAdapter(Cursor imagecursor) {
        mGalleryModelList = new ArrayList<MediaModel>();

        for (int i = 0; i < imagecursor.getCount(); i++) {
            imagecursor.moveToPosition(i);
            int dataColumnIndex = imagecursor.getColumnIndex(MediaStore.Images.Media.DATA);
            MediaModel galleryModel = new MediaModel(imagecursor.getString(dataColumnIndex).toString(), false);
            mGalleryModelList.add(galleryModel);
        }

        mImageAdapter = new GridViewAdapter(getActivity(), 0, mGalleryModelList, false);
        mImageGridView.setAdapter(mImageAdapter);

        mImageGridView.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                // update the mStatus of each category in the adapter
                GridViewAdapter adapter = (GridViewAdapter) parent.getAdapter();
                MediaModel galleryModel = (MediaModel) adapter.getItem(position);

                if ((MediaChooserConstants.MAX_MEDIA_LIMIT == MediaChooserConstants.SELECTED_MEDIA_COUNT)
                        && (!galleryModel.status)) {

                    Toast.makeText(getActivity(),
                            getActivity().getResources().getString(R.string.max_limit_reach_error),
                            Toast.LENGTH_SHORT).show();

                } else {

                    // inverse the status
                    galleryModel.status = !galleryModel.status;

                    adapter.notifyDataSetChanged();

                    if (galleryModel.status) {
                        mSelectedItems.add(galleryModel.url.toString());

                    } else {
                        mSelectedItems.remove(galleryModel.url.toString().trim());
                    }

                    if (mCallback != null) {
                        mCallback.onImageSelected(mSelectedItems.size());
                        Intent intent = new Intent();
                        intent.putStringArrayListExtra("list", mSelectedItems);
                        getActivity().setResult(Activity.RESULT_OK, intent);
                    }
                }
            }
        });
    }

    public ArrayList<String> getSelectedImageList() {
        return mSelectedItems;
    }

    public void addItem(String item) {
        MediaModel model = new MediaModel(item, false);
        mGalleryModelList.add(0, model);
        mImageAdapter.notifyDataSetChanged();
    }
}